期刊
MATERIALS CHARACTERIZATION
卷 145, 期 -, 页码 53-64出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2018.08.029
关键词
Al-Li alloy; Thermal deformation; Constitution model; Dynamic precipitation; Continuous dynamic recrystallization
The constitution model and microstructure of 2A97 Al-Li alloy during thermal deformation were investigated. The thermal deformation behavior was dominated by the interaction between work hardening and dynamic softening. The constitution model was constructed to predict the rheology behavior, in which Zener-Holloman equation with a fifth-order polynomial was set to describe the effect of various strains on the material parameters. Processing maps displayed to exist two unstable domains in microstructure (one domain with the temperature range from 300 degrees C to 370 degrees C and the strain rate range from 10(0.5) s(-1) to 10s(-1), and the other with the temperature range from 380 degrees C to 500 degrees C and the strain rate range from 0s(-1) to 10 s(-1)). Microstructural characteristics of dynamic recovery (DRV) and dynamic recrystallization (DRX) in the stable domain and local rheology in the unstable domain were observed, respectively. The dynamic precipitation (DPN) of T-1 phases and the interaction between dislocations and Al20Cu2Mn3 and Al3Zr phases were concluded by high resolution transmission electron microscopy (HRTEM), which was the first experimental evidence for the DPN in 2A97 Al-Li alloy. All these confirmed the occurrence of the continuous dynamic recrystallization during thermal deformation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据